KR100570703B1 - Safety device to prevent overload of hoist - Google Patents

Abstract

The present invention stops the driving force of the reducer, that is, the worm reducer or winch, when various floats, dirt, or other obstacles are located on the lower, upper, and side surfaces of the gate when the gate descends and rises. The present invention relates to a safety device for preventing overload of a hoisting machine, comprising: a worm part driven by being coupled to a motor and a chain on a lower side of the motor; a bevel gear coupled to one side of the convex part to transmit power; and the bevel gear. And a main gear reducer coupled to the same axis and configured to change the speed of the gear quickly or slowly by power transmission of the bevel gear, and a screw brake unit coupled to one side of the speed changer to prevent the drop of the water gate. And an auxiliary reducer that receives rotational force from the main reducer, and installed inside the auxiliary reducer. In the sprag jack hoisting machine consisting of a sprocket driven and driven, a lock bar operated up and down by the sprocket, and a water gate connected to the lock bar and moved up and down,

One side of the motor is provided with a torque limiter for transmitting or blocking the rotational force.

Hoist, Torque Limiter, Main Decelerator, Overload, Sluice

Description

Safety device for hoisting overload prevention {SAFETY EQUIPMENT FOR PREVENTING OVERLOAD OF WINCH}

1 is a front view showing a winch overload safety device according to the present invention;

Figure 2 is a plan sectional view showing the main decelerator of the winch overload prevention safety device according to the present invention;

Figure 3 is a side cross-sectional view showing a torque limiter of the hoist overload protection device according to the present invention.

Figure 4 is an exploded perspective view showing a torque limiter of the hoist overload protection device according to the present invention.

<Explanation of symbols for main parts of drawing>

10 motor 11: main reducer

12: auxiliary reducer 13: lock bar

14: door frame 17: sluice

21: Hub 24: Ball
24a: home

25: disc spring 26: flange ring

28a, 28b: hole 60: needle bearing

80: shift ring 100: torque limiter

101: nut 110: O-ring

The present invention relates to a safety device for preventing overload of a winch, and more particularly, in the case of various floats, dirt, or other obstacles on the lower, upper and side surfaces of the gate when the gate descends and rises, that is, a worm The present invention relates to a safety device for preventing overload of a hoisting machine, which stops driving force of a reduction gear or a hoisting machine and prevents a water gate breakage and a mechanical device breakage.

In recent years, the weather conditions in Korea have changed so much that it is unpredictable for precipitation. Therefore, thorough management of rivers and reservoirs should be carried out, and water resources management should be given special attention to the reservoirs and drainage sites (drainage pumping stations) in preparation for flooding. . Hydrology is currently developing and improving its technology not only in Korea but also in the world.

In recent years, due to unstable atmosphere due to environmental pollution and global warming, rainfall has changed unpredictably, and in particular, local people have lost many lives and property due to heavy rains. Today's reality is that flooding damage continues as excess of capacity is exceeded. In addition, many houses and fields have been flooded in the water due to the backflow of the river and the collapse of the levees, making everyone unhappy. Hence, the role of the floodgate in the defense of the flood protection that follows is important to protect the property of the public interest.

Hydrological gates are used for various purposes. They play a role of confining water, such as reservoirs, for agricultural use, or preventing the flooding of agricultural lands by blocking the backflow of rivers. In this case, the gate is opened and closed to discharge water.

In general, a method of stopping a water gate by operating a limit switch corresponding to its upper and lower limits during rising and falling has generally been applied.However, due to a defect such as a limit switch, the water gate cannot be stopped. In this case, there was a problem that the floodgate and the mechanical device is overloaded and broken.

And since there is no special device that can detect obstacles in the lower, upper, and side of the gate when the gate is rising and falling, there is a problem that the damage of the machine due to the influence of various floats, dirt, or other obstacles.

In addition, the floodgates installed by the government's budget and the local government's budget may be damaged, causing them to be unusable in case of emergency, resulting in enormous property loss, and causing damage to the repair and budget due to damage to the floodgates. There is a problem.

The present invention is to overcome the above-mentioned conventional problems, the object of the present invention is to stop the movement of the water gate by quickly blocking the load on the output side which is rapidly increased due to obstacles, so that the idling in the motor can be made The present invention provides a safety device for preventing overload of a lifter that prevents damage to a water gate and a lifter due to a falling or rising door.

In order to achieve the above object, the winch overload safety device according to the present invention is a worm portion which is coupled to the motor and chain driven on the lower side of the motor, the bevel gear is coupled to one side of the convex portion to transmit power; A transmission unit coupled to the same axis as the bevel gear to change the speed of the gear quickly or slowly by power transmission of the bevel gear, and a screw brake unit coupled to one side of the transmission unit to prevent the descent of the water gate; A main reducer, an auxiliary reducer that receives rotational force from the main reducer, a sprocket installed and driven inside the auxiliary reducer, a lock bar operated up and down by the sprocket, and connected to the lock bar up and down In the sprag jack winches consisting of a sluice that is moved to

One side of the motor is characterized in that the torque limiter for transmitting or blocking the rotational force is provided.

The torque limiter is a hub connected to one side of the motor and rotated, a disc spring inserted outside the hub to double the pressure in the axial direction, and a flange ring installed on one side of the disc spring to support the disc spring A ball inserted between the hub and the disc spring and between the disc spring and the flange ring to pressurize the disc spring and the flange ring, a shift ring inserted into one side of the flange ring to support the flange ring, and the shift It is composed of a nut inserted into one side of the ring to support the shift ring.

A groove is formed at one side of the hub flange formed at one side of the hub so that the ball is seated, and holes are formed at both sides of the disk spring and at one side of the flange ring.

A bush, a needle bearing, and a plate are inserted into the shift ring, a washer is provided between the shift ring and the nut, and an O-ring is inserted into the outer center of the nut.

Hereinafter, with reference to the accompanying drawings there may be a plurality of embodiments as a safety device for preventing the overloading machine according to the present invention, the following describes the most preferred embodiment.

1 is a front view showing a safety device for preventing the overload of the hoist according to the present invention, Figure 2 is a plan sectional view showing the main decelerator of the safety device for preventing the overload of the hoist according to the present invention, Figure 3 is Fig. 4 is a side sectional view showing a torque limiter of the safety device, and Fig. 4 is an exploded perspective view showing the torque limiter of the safety device for preventing overload of a hoist according to the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in Figure 1 to Figure 4, the hoist overload safety device according to the present invention is a worm unit 50 is coupled to the motor 10 and the chain 112 is driven to the lower side of the motor 10 as a drive source and Bevel gear 40 is coupled to one side of the convex portion 50 to transmit power, coupled to the same axis as the bevel gear 40 is fast or slow by the power transmission of the bevel gear 40 A main gear reducer 11 including a speed change unit 30 for changing a speed, a screw brake unit 20 coupled to one side of the speed change unit 30 to prevent a sudden drop of a water gate, and the main speed reducer ( 11) the auxiliary reducer 12 receives the rotational force, the sprocket 62 installed and driven inside the auxiliary reducer 12, and the lock bar operated up and down by the sprocket 62 And a sluice gate 17 which is connected to the lock bar 13 and moved up and down. The Sprague in the jack winches, achieved by having the torque limiter 100 which is a rotating force on one side of the motor 10 is passed or blocked.

The torque limiter 100 is the torque limiter is provided with a hub 21 which is connected to one side of the motor 10 is rotated, the outer side of the hub 21 is a disk spring for doubling the pressure in the axial direction ( 25) is inserted.

One side of the disk spring 25 is provided with a flange ring 26 for supporting the disk spring 25, between the hub 21 and the disk spring 25 and the disk spring 25 and the flange ring 26 Between the disc spring 25 and the ball 24 for applying pressure to the flange ring 26 is inserted.

A shift ring 80 supporting the flange ring 26 is inserted into one side of the flange ring 26, and a nut 101 supporting the shift ring 80 is inserted into one side of the shift ring 80. do.

A groove 24a is formed at one side of the hub flange 22 formed at one side of the hub 21 so that the ball 24 is seated, and both sides of the disk spring 25 are seated at the ball 24. A plurality of holes 28a and a plurality of holes 28a are formed on one side of the flange ring 26, respectively.

Inside the shift ring is a bush 27, a needle bearing 60 for smooth rotation of the hub shaft 23 formed in the hub 21, and a plate 70 for supporting the needle bearing 60. Is inserted, a washer 90 is provided between the shift ring 80 and the nut 101, and an O-ring 100 is inserted into the outer center of the nut 101 so that the shift ring 80 is outward. Do not let go.

The winch overload safety device according to the present invention having the configuration as described above is operated as follows.

The rotational force transmitted by the rotational force of the motor 10 is transmitted to the auxiliary reducer 12 via the main reducer 11, and drives the lock bar 13 by driving a sprocket embedded in the auxiliary reducer 12. In the conventional method of opening and closing the water gate 17 connected to the lock bar by moving, one side of the motor 10 is equipped with a torque limiter 100 for transmitting or blocking the rotational force to control the torque of the motor 10 In this case, when driving within the rated torque, the ball 24 provided in the torque limiter 100 is applied to the disk spring 25 provided on one side of the hub 21 to press the disk spring 25 is in close contact with the flange ring 26 so that the hub 21 and the flange ring 26 are integrally rotated.

The rated torque at this time means the rated output torque of the motor 10, and within this range, smooth rotation is possible in the forward and reverse directions. However, when a torque greater than the specified torque occurs, that is, when the motor 10 is overloaded, the groove 24a of the hub flange 22, the hole 28a of the disc spring 25 and the hole 28a of the disc spring 25 ) And the ball 24 inserted into the hole 28b of the flange ring 26 is slipped and the motor 10 is idle.

When the overload is released from the motor 10, the ball 24 is automatically seated in the hole 28a of the disc spring 25 to continuously transmit the torque of the motor 10.

Referring to the embodiment that may occur during the operation of the hoist overload safety device according to the present invention.

 When the gate 17 is opened and closed, the gate 17 is in contact with the obstacle when there are solid obstacles in the gate 17, for example, wood chips, stones, metal parts, dead bodies of animals, and various kinds of household waste. When the situation is to do the motor 10 is subjected to a load, the state of the load is as follows.

That is, the starting current of the motor 10 rises to 600% of the rated current, and the torque generated at this time rises to 1.5 to 1.9 times the rated torque. In this state, all the devices and accessories constituting the sluice gate 17 are subjected to a sudden load. At this time, the round bar of the lock bar 13, which is the most vulnerable component of the component, is bent, and as the load is gradually increased. The teeth of the gears of the reducers 11 and 12 are damaged, the shafts are bent, the bearings are broken, and the worms are broken. Finally, the coil of the motor 10 is burned out.

When the obstacle prevents the movement of the gate 17, the torque of the motor 10, which is the driving source, rises above the rated torque. At this time, the ball 24 inserted into the disc spring 25 in the torque limiter 100 is moved. By sliding), the power transmitted to the main reducer 11 is cut off so that only the motor 10 idles. When the obstacle is removed during this process, the disk spring 25 is brought into close contact with the flange ring 26 by the pressure of the ball 24 to perform normal power transmission.

In the overload protection device of the winch according to the present invention having the configuration and action as described above, if an overload occurs in the motor or the machine due to an obstacle when the gate is opened and closed, slip occurs between the ball and the disc spring in the torque limiter. The power transmitted to the main reducer is cut off, and only the motor is idling, thereby preventing the damage of the winch and the sluice and preventing the damage, i.e. the enormous damage to public property, in advance. In addition, it is effective to prevent the waste of the state budget by managing the hydrology, which is a major facility of the government and local governments.

In addition, the overload of the hoisting device causes slips in the torque limit coupling, which wears and damages only the ball and disc springs without damaging other parts, and saves the cost of maintenance and repair because only the ball and disc springs need to be replaced. It is effective.

In addition, when the water gate is manually opened and closed by installing the convex portion in the main reducer, the user can operate the water gate with a small force, so that the work can be performed quickly, and the worm portion prevents reverse rotation when the water gate stops in the middle. By acting as a brake, it is possible to prevent the gate from falling due to its own weight, and there is no need to install a separate shock reducer on the top of the main reducer, thereby simplifying the structure of the winch.

Claims (4)

A worm portion coupled to the lower side of the motor and driven by a chain, a bevel gear coupled to one side of the convex portion to transmit power, and coupled to the same axis as the bevel gear, by a power transmission of the bevel gear, or A main reducer comprising a speed changer portion that slowly changes the speed of the gear, a screw brake portion coupled to one side of the speed changer portion to prevent a sudden drop of the water gate, an auxiliary reducer that receives rotational force from the main reducer, and the auxiliary reducer In the sprag jack hoist consisting of a sprocket installed and driven in the interior, a lock bar operated up and down by the sprocket, and a water gate connected to the lock bar and moved up and down, One side of the motor is provided with a torque limiter for transmitting or blocking the rotational force, the torque limiter 100 is On one side of the surface has a hub flange 22 having a groove 24a to seat the ball 24, the other side is provided with a hub shaft 23, the hub is connected to one side of the motor 10 is rotated 21; A disk spring 25 inserted around the hub shaft 23 of the hub 21 to double the pressure in the axial direction, and a plurality of holes 25a formed at both sides of the body; A flange ring 26 installed at one side of the disc spring 25 to be connected to a reducer of the sluice 17 to support the disc spring 25 and having a plurality of holes 28b formed at one side thereof; ; Between the groove 24a of the hub 21 and the hole 28a of the disc spring 25, between the hole 28a of the disc spring 25 and the hole 28b of the flange ring 26, A plurality of balls 24 for applying an elastic force to the disk spring 25 and the flange ring 26; A shift ring (80) inserted into one side of the flange ring (26) to support the flange ring (26); Safety device for preventing overload of the lifter, characterized in that it comprises a nut 101 is inserted into one side of the shift ring (80) to support the shift ring (80). delete delete The method of claim 1, The inner side of the shift ring 80 is assembled so that the bush 27, the needle bearing 60, and the plate 70 overlap each other, and a washer 90 is disposed between the shift ring 80 and the nut 101. Is provided, the outer ring of the nut 101 is inserted into the O-ring (110) to prevent the shift ring (80) from being separated from the hub shaft (23).

Images